Nonstop box wrapping machine



May 6, 1941. E. e. RIDER NONSTOP BOX WRABPING MACHINE Filed May 8, 1940s Sheets-Sheet 1 ERNEST GEORGE RIDER BY @am, @0140. +61% ATTORNEY Ma 6,1941. E; G. RIDER NONSTOP BOX WRAPPING MACHINE Filed May 8, 1940 3Sheets-Sheet 2 INVENTOR ERNEST GEoReE Rmm BY m, smm+a ATTORNEY May 6,1941. E. G. RIDER 2,241,160

NONSTOP BOX WRAPPING MACHINE Filed May 8, 1940 3 Sheets-Sheet 3 INVENTORE RNEST'GEORGE R1050.

ATTORNEY Patented May 6, 1941 NON STOP BOX WRAPPING MACHINE Ernest G.Rider, Philadelphia, Pa., assignor to Stokes and Smith Company,Summerdale, Pa., a corporation of Pennsylvania Application May 8, 1940,Serial No. 333,995

4 Claims.

This invention relates to nonstop box wrapping machines.

The invention relates to a machine for automatically applying a Wrap orwrapper comprised of a middle panel portion and end flaps or panels, toan open sided box, with the respective side and end flaps of the wrapadherent to the box side and end walls and turned over the respectiveupper edges of all walls to adherent termination on the inner uppersurfaces of the box walls whereby the entire outer and upper surfaces ofthe box is covered by the adherent wrap or wrapper. Among other types ofboxes utilizing such wrappers may be mentioned boxes for cigars. Theseinitially have no resemblance to the cedar boxes conventionally used inthe past art for cigar boxes, as they are made either of inferior woodor of cardboard or the like, so that the decorated and colored wrapsuitably applied makes a more decorative and attractive packagesimulating the appearance of the expensive cedar boxes. Obviously thereare many other types of boxes which are improved or completed by theaddition of. a suitable wrap.

As the art of wrapping boxes has developed hitherto, as represented forinstance by certain machines of the Stokes and Smith type, the wrapperhas been pasted, the box centered thereon and either directly orultimately placed upon or pushed against a depressible spring-pressedplunger head, platform or lower forming block, with a two-piece orupperand middle or intermediate forming or pressure block placed in the boxand arranged for vertical reciprocation under power. Thevertically-reciprocable forming or pressure block assembly is formed ofthe upper and middle blocks cam-actuated to progressively push the boxand the partially adherent wrap downwardly with and on the plungerplatform or head as the side flaps or panels of the wrapper are firstmoved up into contact with the side walls of the boxes by machine siderollers or the like, pursuant to which the assembly stops to permithorizontally slidable reciprocating lap plates to be projected laterallyof the box to turn the vertical edges of the side wall flaps or panelsof the wrapper about the ends of the box, pursuant to which the assemblyresumes its downward travel while the lap plates remain vertically fixedin engagement with the mar-gins of the side flaps to hold the latteragainst the box ends with a wiping motion while the end flaps areapplied to the ends of the box superposed over the turned in verticaledges, pursuant to which the upper flap edges of all of the side and endflaps are turned over the upper edges of the box walls. The importantthing in the consideration of this procedure in the light of the presentinvention is the stop hitherto necessary to permit the horizontallyprojected lap plates to function. This stop, at least after the machinehas begun to wear, is accompanied by nerve-wracking sounds and shocks toadversely affect the eifioiency of the operator, of itself it effectsincreased wear on the machine, ultimately results through wear andvibration in inferior and unstable work, and, of probably greatestimportance, it slows down the machine and limits its output over thatwhich is available without increased labor if the stop were eliminated,

It is among the objects of this invention to provide a wrapping machinehaving a nonstop run in a stop cycle of operation, for applying a wrapto a box; to provide improved linkage for actuating lap plates; toprovide a new mechanical movement for lap plates and the like; toprovide an oscillatable lap plate having a motion a resultant of tworelatively normal motions; to provide a lap plate having a simultaneousoutward and downward movement in synchronous relation to the downwardmovement of the box and wrap; to provide a movable lap plate so arrangedthat a wiping turning in operation can be secured for the full length ofthe turned in edge of the side flap of a wrap during a nonstop travel ofthe box and wrap past the effective support of the lap plate; to providea nonstop box wrapping machine which automatically takes care of boxesof different depths without adjustment of the mechanism; to provide anonstop wrapping machine which takes care of boxes of varying lengths orwidths by a simple and facile adjust ment; and many other objects andadvantages will become more apparent as the description proceeds.

In the accompanying drawings forming part of this description:

Fig. 1 represents a fragmentary plan of a machine according to oneexemplification of the invention, with the upper side flap wrappingrollers removed and an illustrative box in position therein, but withthe wrapper omitted for clarity.

Fig. 2 represents a perspective of a box in operative centered relationto a pasted label showing the flaps and the assembly just beforestarting on the wrap-applying cycle of the machine (with the boxthickness exaggerated for the type of wrap disclosed).

Fig. 2a represents a similar perspective of box and wrap afterthe sideflaps of the wrap have been adhesively applied to the box side walls.

Fig. 21) represents a similar perspective of the box and wrap after theedges or margins of the side flaps have been turned in to engagementwith the end wall of the box. Y

Fig. 20 represents a similar perspective of the box and wrap of Fig. 2bafter the end flaps of the wrap have been adhesively applied to suchturned in edges and the end walls of the box.

Fig 2d represents the box and wrap of Fig. 20 after the upper outermargins of the side and end flaps have been turned inover the. upperedges of the walls of the box to adhesive attachment to the innersurfaces of the walls thereof.

Fig. 3 represents a side elevation of the improved lap plate of theinvention, in one exemplification thereof, showing the auxiliarysupporting link, and showing in successive dotted line positions theresultant progress of the ad vancing descending lap plate.

Fig. 4 represents a skeletonized side elevation of the machine accordingto a preferred embodiment, showing a fragment of the upper forming orpressure blockv in section in an illustrative box, also indicated insection, just before the upper forming block, lower plunger or formingblock, plate or head, box and pasted wrap forming the assembly start tomove together downwardly through the wrapper side-fiap-applyingrollswith the side flaps extending substantially horizontally over theside-fiap-applying-rolls, before the mechanism shown controlling theimproved lap plates has been actuated to advance the lap plates.

Fig. 5 represents a horizontal section through the plunger shaft and afragmentary plan of the cam lever and the lateral bosses on the plungershaft to actuate the cam lever.

Figs. 6, 7 and 8 represent fragmentary side elevations of thelap-plate-actuating gear train and the assembly with the box and appliedwrap showing the beginning and the completion of the concluding edgelapping movements of the box assembly through the machine after theinitial position shown in Fig. 4, and respectively; the attachment ofthe side flaps to the box and the position of the parts substantially atthe beginning of the movement of the lap plates of this invention;through lapping the edges of the side-flaps about the end of the box ina nonstop s'equence preliminary to the final application of the endflaps thereto and the turning inof-all of the upper flap edges over theupper box edges.

It will be understood that in the broader implications'of the inventionit makes no particular difference what the nature of the box may be.That is it may be of metal, Wood or cardboard or the like, or it may becombinations of these or other materials. It may be of any size or shapeor proportions according to the capacity of the machine. It may beaplain oblong or square box, or it may be provided with a bottom flangeorlateral. extension of the bottom wall. The end walls may be of thesame level as the side walls or higher or lower than same.

For illustrative purposes the box shown, for instance, in Fig. 2 may beconsidered to be formed of cardboard. The box comprises a bottom wallIt), end walls H and I2, and side walls 53 and It. It will beassumed'for illustrative purposes that the walls all terminate in upperedges I5 lying in a commonplane. In order to indicate the fact that thewalls have an actual thickness it may be that the box shown in Fig. 2may be considered to be exaggerated in thickness, in contrast to thewrap shown, as with such apparent wall thickness the perfect cornersshown in the finished wrapped box of Fig. 2d may not be secured withoutproviding either special slitting mechanism or the like, or a specificknicked type of wrapper (not shown herein). Obviously in the broaderaspects of the invention this makes no difference as the box thicknessmay be anything desired, as may the characteristics or outline of thewrapper.

The wrapper comprises a central portion is (Figs. 4 and 6) preferablyslightly tapered end flaps IT and I8, (Fig. 2) and side flaps 28 and 21.Each side flap has side edge portions 22 which are ultimately to befolded about the end walls H and [2 of the box, as well as panel endedge portions l9 which are to be folded about the upper edges of the boxand to adhesive engagement with the inner surfaces of the respectivewalls. Figs. 2, 2a, 20 and 2d illustrate diagrammatically theprogression of the attachment of the wrap to the box.

Referring to Figs. 4 or 6 certain standard or conventional wrappingmachine parts are shown which, standing alone, formno part of thepresent invention. Thus a cam driven vertically reciprocable plungershaft 23 is provided, arranged for a substantially downward run ormovement which is nonstop between the vertically spaced upper and lowerlimits of the run half cycle, in a stopped complete cycle of movement,in place of the conventional one stop in the half cycle-0f the presentwrapping machines. The plunger shaft carries at its lower end thereplaceable variably sized separable two piece forming or pressingblockcomprising upper block 24 and middle or intermediate block 25 as isconventional, and of such .composite vertical extent asto be ofapproximately the same height as the box to be wrapped.

A table, platform, plunger head or lower forming block 21 is mounted onthe upper end of a spring pressed plunger shaft 28. It is to beunderstood that the head 2'! is preferably replaceable to accord withthe lateral dimensions of the box to be wrapped (as is the pressure heador upper forming blocks), and that the head and shaft 28 are drivenguidedly downwardly against the resilient resistance of a conventionalcompression spring, or the like, (not shown).

The machine is provided with upper wiper elements such as the rollers 38and 31 disposedbelow the'normal or initial starting positioning of theplunger head or lower forming block 2?. These wiper elements aredisposed in horizontal V spaced parallel relation and arranged foradjustment in location to accord with changes in box size, and arerespectively arranged to wipe the pasted or glued side flaps 20 and 2!of the wrap into adhesive contact with the side walls l3 and M of thebox, as is conventional.

The machine isalso provided with lower wiping elements such asjournalled rollers 32 and 33, the. axes of which be in a commonhorizontal plane in vertically spaced relation to a hori zontal planecontaining the axes of journaled rollers 30 and 3!. Rollers 32 and 33are similarly relatively adjustable and are used to apply the glued endflaps l1 and I8 adhesively' to box end walls H and I 2, as isconventional. It will be understood that any devices such as brushes andthelikemay be usedin place ofor supplementary to any of the respectiverollers 30, 3!, 32 or 33.

Referring to Fig. 4, the box is shown in fragmentary section with afragment of the upper forming blocks 24 and disposed therein and withthe box resting upon the center panel l6 of the wrapper and with thelatter resting upon the upper head or lower forming block 21 of theresiliently mounted depressible shaft member 28. When the assembly hasbeen moved downwardly, toward the initiation of the wiping movements, tothe position shown in Fig. 4, the side flaps 20 and 2! restsubstantially upon or engage the rollers and 3| preparatory to movingthe flaps upwardly against the box walls. It will be obvious thatdownward movement of the assembly of upper and lower forming blocks, boxand wrap, in moving from the position shown in Fig. 4 to that of Fig. 6,will have had the side flaps 20 and 2| rolled upwardly by rollers 30 and3| into adhesive engagement with the respective side walls l3 and M ofthe box, as shown in Fig. 2a. The important part of the sequence ofoperative steps or at least of progressive positions of the parts, as noactual discontinuous downward motions are involved in the downward halfcycle of the ring from the standpoint of this invention, is shown inFigs. '7 and 8 as securing the turning-in of the vertical marginal edgesof the side flaps to the position shown in Fig, 2b. The mechanism forsecuring this functional result comprises the rotating lap plates, oneof which is shown in a series of sequential positions in Fig. 3, so faras the actual wrap contacting element is concerned. The operatingmechanism of the lap plate is shown in'fragmentary form in Figs. 6 to 8inclusive and in extenso in Fig. 4.

Oscillatably mounted upon suitable supports (not shown) and disposed insubstantial parallelism with the axes of rollers 36 and 3| are thepreferably squared shafts 34 and 35. As the shafts and their coupledmechanisms and appurtenances are substantially identical, but one willbe described and similar reference characters will be used on theseveral parts of each.

It is contemplated that suitable means will be provided to causeadjustment of the shafts 34 and 35 relating to each other and to theforming blocks to accord with variations in sizes and proportions ofboxes to be wrapped.

The lap plate 36 of this invention comprises the elongated wipingportion 3'! having a lower toe 38 and a wiping surface 40 comprisedpreferably of spaced parallel semi-cylindrical elements 4| and 42(Fig. 1) arranged to form the actual margin contacting portions of thelap plates. The lap plate 36 has a restricted rear neck 43 terminatingin the spaced ear portions 44 and 45 suitably apertured to receive apintle 46 and to engage between the ear portions 41 and 48 of a link 56.The surface 49 between lap plate ears 44 and 45, and recessed surface 54between link ear portion 4'! and 48 affords clearance in which springelement 5| is disposed embracingly about the hinge pintle 46, with itsfree ends bearing on the same side respectively of the link 50 and thelap plate 36, as at 52 and 53 to urge the lap plate resiliently in onedirection. Preferably the ears 44 and 45 each have a protruding edgeportion leading to a cut away or rounded edge portion with theprotruding portions arranged to abut the link surface 54 to limit orstop the swinging motion of the lap 36 in the direction opposite to thespring resisted movement, so that it does not move out of substan- 65mounted on pivot 66 upon the base or frame the parts.

tial alignment with the link 50, while the rounded edge permits lateralswinging against the resistance of the spring 5| in the other direction.

The link 50 at the front is pivoted at 55 to a second link 56 and thelatter is pivoted at the lower end at 51 to a relatively fixed portionof the housing or frame journalling the squared shaft 34. The rear endof the lap link is pivoted at 58 to an arm 60 on the rotative element 6|having the square face 59 and mounted axially adjustable on but turningwith the squared shaft 35. Obviously pivot 51 and element 6| aredisposed in a guiding housing 69 and arranged for adjustments as unitsto accord with variable box lengths.

From an inspection of Fig. 3 it will be observed that rotation of theelement 6|, with the shaft upon which it is slidably mounted, from thefull line position shown, will impart a compound motion to the lap platethrough its supporting linkage, which is a resultant of differentialoutward and downward motions, in which the toe 38 is advanced laterallyand downwardly leading the plate in its movement toward ultimatealignment with the vertical.

t will be evident that if the lateral and downward movements could becombined with the purely vertical motion of the assembly box and wrap inexact synchronized relation the vertical margins of the adherent sideflaps of the wrap could be turned in about the ends of the box withoutbreaking the stride of the advance, or in other words without stoppingthe cycle of assembly movement. By reference to Fig. 4 an illustrativemechanism for securing this result is disclosed. It will be understoodthat the resiliently held depressible shaft 28 constitutes the powerfactor for the lap plates.

As the downward descent of the supporting column 28 against theresistance of the spring associated therewith is as a function of theprogress of the box and wrap through the machine, it will be observedthat the synchronization of the shaft movement with the lap platemovement will secure the proper timed relation of To this end the springpressed shaft 23 is provided with a pair of diametrically alined studs62 in operative aligned relation with the free end of the spring-pressedlap-plate actuating cam 63, pivoted at 64 to the bell crank leverelement 61. The cam element 63 is pivoted in a clevis on the end of thebell crank and has an underlying extension 63 engaging under the arm ofthe bell crank to positively limit the relative motion of the cam andlever in one direction and has a planar abutment 10 engaged by the levercarried spring H to resiliently permit limited relative movement of thecam and lever in the other direction to permit the studs 62 on theirupward return trip with the power factor to wipe the rear surface of thecam 63 without actuating the parts in the return half cycle of themachine. as will be clear.

The cam 63 preferably comprises two spaced parallel cam elements 12,each having the cam surface 13 leading to the release passage 14, andone at least is provided with the cam guard 15 in spaced overlyingrelation so arranged that the impact of the studs 62 against the camsurfaces 13 cannot fail to result in a maintenance of the contact of thestuds against the cam surfaces to insure controlled synchronous lapplate movement. It will be understood that a complete cycle of camactuation takes place during the wiping until the cam has been moveddownwardly to such a position that the studs align with the releaseslots, l6, and the continued downward movement of the studs 6-? throughthe release slots permits the camand bell crank to return to its initialsetting under the influence of the tension spring E6. The latter engagesbetween an arm H of the lever, and the base El, as will be clear. Uponthe return stroke of the studs 62 the rear surface of the cam 53 isengaged and the cam is bent upwardly about its hinge point 64 againstspring H, to a degree sufiicient to permit the free vertical passage ofthe studs to complete the return half cycle preparatory to theapplication of anew box and wrapper to the working parts and anothercycle of wrap applying.

It being desired to secure variations in; the strokes of the actuatedparts, the arm'lB is arc-uately slotted as to 8% to receive theadjustably positioned pivotally element 8% to which the link 82 ispivoted. The other end of the link 82 connects through pivot 83 withrack 84; Ohviously the length of the stroke of the rack depends upon theadjusted position of the element 8! in the slot Bil, as will be clear.The free end of the arm iii of the bell crank lever comprises a stop 85abutting the adjustable abutment 86, to control the initial setting anddegree of swinging of the cam and bell crank assembly,

It being understood that there is a complete cycle of reciprocation ofthe rack 84 for every down stroke of the assembly including power factorshaft 23, it will now be pointed out how this substantially horizontalreciprocation is made effective upon the lap plates of the invention.

Still referring to Fig. 4, it will be observed that the base frame ii?forms a journal for a shaft 35 carrying a pinion gear 86 in mesh withthe rack 84 and keyed to the shaft so that at the front endthe lever 8?,keyed to the shaft 85, can actuate the vertical link 88 pivoted to thelever at itiii. The link contains a transverse pivot ifli. and at theupper end terminates in a pivot I02 connecting it with the vertical rackHi3 slidably guided in the housing M34. The latter supports the rackgear 1% in mesh with the rack Hi3, and also journals the pinion gear Hi6having the squared center opening and arranged to receive thetrans-verse shaft 35 to drive same in an oscillatory cycle. From theprevious description it will follow that the cyclic oscillation ofeither shaft 34 or 3% will cause the cyclic extension and retraction ofboth of the spaced respective lap plates operatively associatedtherewith.

It being understood that vertical shaft 88 is in one side of the centerline of the assembly of box and wrap and actuating parts, so as toactuate a single shaft 35, although controlling both of the lap plateson said side, the rear end of the shaft 85 is coupled through auniversal joint, (not 7 shown), to drive the offset shaft H. 1,journalled on the frame for synchronous actuation by the bell crank andcam assembly of Fig. 4. The free end of the shaft iii! carries a leverI83, driving a vertical shaft and rack combination 88, exactly similarto the first one described. The angle between the shafts 85 and fill issuch as to permit actuation of shafts 34 and 35 on opposite sides of thebox and wrap assembly.

Referring now to Fig. 6, it will be observed that the. box and wrapassembly has passed downwardly throughthe side-flap-rollers 3i)" and 3|,

so that the side flaps have become adherent to the box, and the verticalmarginal portions still lie in the plane of the respective adherentportions as shown in Fig. 2a. At this point the studs 62 on the powerfactor have first contacted with the ends of the cam surfaces '13 andthe linkage and train of mechanism has just started the inward anddownward motion of the lap plates.

As shown in Fig. 7, the further continued downward motion of theassembly from the position of Fig. 6, finds the train of mechanismactuating the lap plates to a point where the advancing toes thereofhave engaged the lowermost portion of the margins 22 and started to turnthe margins When the first contact of the oscillatible lap plates ismade with the margins of the side flaps, as shown in Fig. 7, it is withthe toes of the plates, which advancing first, strike the lower portionof the margins and turn them in so that instantaneously the margin isbent into a substantial triangle, as the upper edges have not beencontacted. However, the continued downward movement of the assemblythrough the power factor continues the synchronous progress of theoscillatible lap plates and the heel or upper ends of the lap plates areprojected forwardly after the toes have established the initial contact,and the advance of the lap plates is continued to a point at which theentire wiping surfaces or edges of the advancing lap plates haveattained substantial verticality and the margins have been turned in tothe four sided figures shown in Fig. 8.

It will be appreciated that the lap plates may be held against theturned-in margins for a small interval while the box assembly continuesits descent. This enables the maintenance of the turned in engagementfor a length of time sufiicient to permit the end flaps H and Hi to bebent upwardly by the end flap rollers or brushes 32 and 33 to overlie orto be superposed upon the turned in vertical margins, as is common inthis art.

The complete cycle of operation comprises a wrapping half cycle in whichthe assembly starts at the top and passes all of the distance to thebottom of its stroke without a stop, during which, as noted theoscillatable lap plates are projected and moved downwardly to turn inthe end margins. Before the assembly of box, wrapper and forming blocksreach the bottom of their stroke it will be understood that the studs 62on the power factor shaft 28 will have passed through the phase ofcontacting with the lateral cam surfaces of the arms 12, but will haveproceeded further to the relief slots 15 which have by then been swungdown into position for alignment with the descending power factor studs52', during which the lap plates will have been held stationary in theiradvanced depressed position to complete the vertical wiping on theturned in margin. The further descent of the studs of shaft 28 bringsthem clear of the relief slots l5, which relieves the cam lever of itsdistorted positioning and permits it to return to the normal or initialposition under the influence of the spring on the base and bell crank.At the bottom of the downward half cycle of the machine, the upper edgesl8 are turned in in the conventional manner by separating the upper andintermediate forming blocks while turn in fingers, not shown push theupper edges it? across the upper wall surfaces l5, to subsequentbrushing downwardly on the inside surfaces of the upper portions of thewalls as is conventional, by lowering the upper forming block into thebox again from which it has withdrawn. This latter step as such forms nopart of the instant invention.

After the wrap has been completely applied to the box at the conclusionof the non-stop downward half cycle, the entire assembly rises again tosubstantially the starting position, during the course of which thewrapped box is stripped from the forming blocks and ejected laterally,and again this is in accordance with conventional practices. This marksthe return or upward half cycle of the complete run.

Note that the problem of synchronization of the descending assembly,with the lap plate movement, is secured by causing the descendingassembly to constitute the power factor actuating the lap plates,although obviously if other synchronization and power means are desired,with the improved lap plates of this invention, they may be resorted to,without departing from the spirit and scope of the instant invention.For instance, it is contemplated that in place of the tension device 16for returning the parts to the initial or starting position as shown inthe drawings, such return may be accomplished positively in any desiredmanner as by a cam mechanism suitably disposed for the purpose andeither independently actuated or coupled with the primary cam means forcon-trolling the cyclic movement of the upper forming blocks. It is tobe noted also that the lap plates with their slight flexibility ofmounting are arranged for slight lateral bendings to accord with slightvariations in the profiles of the boxes, and the like, while having acurved entering or leading edge to guide the lap plates past the ends ofthe box while in contact with the margins. It is pointed out as afurther important feature of the invention with the lap plates asdisclosed herein and with their actuation being controlled by themovement of the lower forming block, the initiation of the cyclic lapplate movement is predicated upon the arrival of the upper surface ofthe lower forming block substantially in alignment with the lowerportion of the lap plate which is practically synonymous with the bottomsurface of the box so that the lap plate cycle is always initiated inaccordance with the location of the bottom of the box regardless of thevertical thickness of the box. This is important because it enables themachine with a single setting to take care of boxes with varyingvertical heights.

It is contemplated both to build new machines incorporating the improvedlapplate and its actuating means, or to provide the latter asattachments for existing machines.

I claim as my invention:

1. In box wrapping machines, a lap plate assembly comprising a lap platehaving a turn-in portion, a link pivotally supporting the turn-inportion at one end, means pivotally supporting the free end of the link,an oscillatable arm, pivot means engaging the turn-in portion with thesaid arm, and means for oscillating said arm whereby the turn-in portionis moved as a resultant of two angularly divergent motions.

2. In box wrapping machines, a lap plate assembly comprising a lap platehaving a turn-in portion, a link pivotally supporting the turn-inportion at one end, means pivotally supporting the free end of the link,an oscillata'ble arm, pivot means engaging the turn-in portion with thesaid arm, means for oscillating said arm whereby the turn-in portion ismoved as a resultant of two angularly divergent motions, and means formoving a box and wrap across the line of the turnein portion movement inthe direction of one of the motions of which the turn in movement is aresultant with the edge of the box in substantial alignment with thesaid turn-in portion.

3. In box wrapping machines, a lap plate assembly comprising a lap platehaving a turn-in portion, a link pivotally supporting the turn-inportion at one end, means pivotally supporting the free end of the link,an oscillatable arm, pivot means for engaging the turn-in portion withthe said arm, means for oscillating said arm whereby the turn-in portionis moved as a resultant of two angularly divergent motions, means formoving a box and wrap across the line of the tumin portion movement inthe direction of one of the motions of which the turn in movement is aresultant with the edge of the box in substantial alignment with thesaid turn-in portion, and means responsive to the movement of the boxfor actuating the said means for oscillating said arm.

4. In box wrapping machines, means operable with a box and associatedwrap in a continuous movement between limits, a pivoted lever, a camelement mounted on the lever and comprising a curved surfacecommunicating with a relief passage and arranged to be abutted by saidfirst mentioned means to actuate the lever as a predetermined functionof the movement of said first mentioned means, said relief passage beingarranged to permit the continued movement of said first mentioned meanswhile holding the lever in a predetermined immovable position, a lapplate, means mounting the lap plate for a resilient motion transverselyand also in the line of movement of such box and wrap, and a train ofmechanism coupling said lap plate as a function of the movement of suchbox and wrap and for maintaining the lap plate in a predeterminedadvanced position by the functioning of said relief passage duringcontinued motion of the box and wrap.

ERNEST G. RIDER.

